A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs. Color validation of TOI-4479b and TOI-2081b

Bibcode
2022A&A...666A..10E
DOI
10.1051/0004-6361/202243731
Esparza-Borges, E.; Parviainen, H.; Murgas, F.; Pallé, E.; Maas, A.; Morello, G.; Zapatero-Osorio, M. R.; Barkaoui, K.; Narita, N.; Fukui, A.; Casasayas-Barris, N.; Oshagh, M.; Crouzet, N.; Galán, D.; Fernández, G. E.; Kagetani, T.; Kawauchi, K.; Kodama, T.; Korth, J.; Kusakabe, N.; Laza-Ramos, A.; Luque, R.; Livingston, J.; Madrigal-Aguado, A.; Mori, M.; Orell-Miquel, J.; Puig-Subirà, M.; Stangret, M.; Terada, Y.; Watanabe, N.; Zou, Y.; Baliga Savel, A.; Belinski, A. A.; Collins, K.; Dressing, C. D.; Giacalone, S.; Gill, H.; Goliguzova, M. V.; Ikoma, M.; Jenkins, J. M.; Tamura, M.; Twicken, J. D.; Ricker, G. R.; Schwarz, R. P.; Seager, S.; Shporer, A.; Vanderspek, R.; Winn, J.
Bibliographical reference

Astronomy and Astrophysics

Advertised on:
10
2022
Journal
Astronomy and Astrophysics
Number of authors
48
IAC number of authors
16
Citations
6
Refereed citations
6
Description

Aims: We report the discovery and validation of two TESS exoplanets orbiting faint M dwarfs: TOI-4479b and TOI-2081b.
Methods: We jointly analyzed space (TESS mission) and ground-based (MuSCAT2, MuSCAT3 and SINISTRO instruments) light curves using our multicolor photometry transit analysis pipeline. This allowed us to compute contamination limits for both candidates and validate them as planet-sized companions.
Results: We found TOI-4479b to be a sub-Neptune-sized planet (Rp = 2.82−0.63+0.65 R⊕) and TOI-2081b to be a super-Earth-sized planet (Rp = 2.04−0.54+0.50 R⊕). Furthermore, we obtained that TOI-4479b, with a short orbital period of 1.15890−0.00001+0.00002 days, lies within the Neptune desert and is in fact the largest nearly ultra-short period planet around an M dwarf known to date.
Conclusions: These results make TOI-4479b rare among the currently known exoplanet population of M dwarf stars and an especially interesting target for spectroscopic follow-up and future studies of planet formation and evolution.
Related projects
Projects' name image
Exoplanets and Astrobiology
The search for life in the universe has been driven by recent discoveries of planets around other stars (known as exoplanets), becoming one of the most active fields in modern astrophysics. The growing number of new exoplanets discovered in recent years and the recent advance on the study of their atmospheres are not only providing new valuable
Enric
Pallé Bago
In progress
Type
Refereed
Exoplanetary Systems & Solar System (SEYSS)
Methods
Techniques

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